Table 6 Parameters of the studied Pseudo-First-order and Pseudo-Second-order kinetic models of CaCO3 and CaO adsorbents.
Model | Parameters | CaCO3 | CaO | ||||
|---|---|---|---|---|---|---|---|
Pb+2 | Cu+2 | Cd+2 | Pb+2 | Cu+2 | Cd+2 | ||
Pseudo-first-order | K1 (mg/g min) | 0.089 | 0.033 | 0.029 | 0.052 | 0.036 | 0.048 |
qe (mg/g) | 484.06 | 122.8 | 1.14 | 1220.4 | 843.53 | 492.5 | |
R2 | 0.7492 | 0.882 | 0.9638 | 0.8915 | 0.9392 | 0.8122 | |
Pseudo-second-order | K2 (mg/g min) | 0.00016 | 0.00022 | 0.14 | 0.0001 | 0.00015 | 0.0083 |
qe (mg/g) | 434.78 | 169.49 | 1.165 | 3333.3 | 1111.1 | 71.9 | |
h (mg/g min) | 31.2 | 6.43 | 0.19 | 1111.1 | 185.19 | 43.1 | |
R2 | 0.9457 | 0.9709 | 0.9984 | 0.9898 | 0.9619 | 0.9402 | |
